Walt Whitman is America’s world poet—a latter-day successor to Homer, Virgil, Dante, and Shakespeare. In Leaves of Grass (1855), he celebrated democracy, nature, love, and friendship. This monumental work chanted praises to the body as well as to the soul, and found beauty and reassurance even in death.

Along with Emily Dickinson, Whitman is regarded as one of America’s most significant nineteenth century poets. Born on Long . . .